Bellows



Dec. 5, 1950 w. c. HASSELHORN BELLOWS 2 Sheets-Sheet 1 Filed March 22, 19.45

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Dec. 5, 1950 w. c. HASSELHORN 2,532,

BELLows Filed March 22, 1945 2 Sheets-Sheet 2 IN V EN TOR. Malia? C fiaeselkarm v l I 7m 62% r Patented Dec. 5, 1950 "UNITED STATES PATENT OFFICE BELLOWS 1 Walter C. Hasselhorn, Chicago, Ill., assignor to Co'okElectric Company, Chicago, 111., a corporation of Illinois '"Application March 1945 Serial No. 584,041

directed to the making of a bellows of doughnut.

shape.

As heretofore constructed, bellows have been limited in design to cylindrical bodies having the interior either as an open or a closed chamber. Incertain instances'the bellows have formed the interior wall of a pressure unit and the pressure has been applied exteriorly to collapse the bellows upon an increase of pressure. Thus the pressure chamber extended across and closed off one end of the bellows. The wall movable by the action of the bellows was therefore disposed within the unit itself and the work arm projected centrally through the open end to transmit motion. The arrangement inherently prevented transmittal of force axially by a relatively flat annular face.

The invention herein disclosed is concerned with overcoming the aforesaid limitations in bellows design and providing a new type of bellows.-

This new type of bellows is'designed to transmit force by a substantially flat annular ring like surface. This transmission of force is preferably uniform axially over the entire surface of the flat'annular ring to secure uniform application of the force.

More specifically, the invention may include a bellows comprising spaced annular walls defining an annular chamber, the walls being constructed of sectional parts having flexible portions, and, in the specific embodiment of the invention illustrated herein, these sectional parts may extend inwardly or outwardly of the plane of said walls whereby both walls maybe axially flexed and the concentricity between the same maintained during the flexing.

Accordingly, it is an object of the invention to provide a new and improved type of bellows capable of performing work in various adaptations that did not admit of the use of bellows heretofore.

The inventive idea involved is capable of embodiment in a variety of ways, and, for the purposes of illustration, several of these embodiments are specifically described and shown in the accompanying drawings, in which:

known as bel-' 6 Claims. #(Cl. 1-37 s.5

'--Figure 1 is a cross sectional view illustrating one of the various possible adaptations of a bellcws 'embodying the present invention;

-- Figure 2 is an end view of this bellows;

Fig. 3 is an enlarged sectional view taken on line 3-3 of Fig. 2;

Fig. 4 is a similar view illustrating a different form of end connections at the points of adjacent sections;

Fig. 5 is the same structure as shown in Fig. 4 but inexpanded position;

Fig. 6' illustrates a further modified form of structure; and

Fig. '7 is a perspect ve view, with a portion in section, of a completed bellows unit with end plates attached at both ends and illustrating how the capacity may be readily varied.

As stated, Fig. 1 illustrates one of the adaptations of a bellows embodying the invention. Any one of the bellows structures shown in Figs. 1, 3, 4 or 6, or ecuivalent structures, may be used.

. The bellows un t comprises two concentric wal s 2 and 3 consi ting of sectional parts including concentrically s aced annular wall members l, 5 and 6 and members I, 8, 9 and [0 arranged in pairs, the members of each pair preferably folding upon each other and extending out of the planes of walls 2 and 3. Quite obviously a more compact unit may be provided if the wall members "I, 8, 9 and ill extend inwardly between wall members 4, 5 and 6, but they may also'e'xtend outwardly or'in opposite direct ons away from the wall members Al, 5 and 6, if so desired.

The manner in which the folding wall members are formed with respect to annular wall members 5 and 5 may vary. In Fig. 3, folding wall members 1 and 3 extend from the out ide concentric wall 2 comprising members 5 and 6 and the parts 9 and H! extend from the inside concentric wall 3 comprising member 4. To illustrate, part i may be integrally formed with its connecting wall member 5, while part 8 may be separately formed and secured to its connecting wall member 6. Likewise, part 9 may be integrally formed with its connecting wall member 4 while part i!) may be separately formed and secured to a bottom wall H by a joint l2 which may be formed in part by a flange It on bottom wall N. Parts l and 8, as well as partsii and H1, may be connected together at their inner ends by suitable joints i4 and 15, as by flanging the edges of parts 8 and [U at l6 and l! to lap over the edges of parts 1 and 9. The opposite edge of part 8 may have an upturned flange l8 over which a flange IS on the adjacent connecting wall member 6 is crimped to form joint 20. Bottom wall I may be integrally formed with wall member 6, or it may be separately formed as in the case of a top wall 2|. Top wall 2| is provided with overlapping down turned flanges 22 and 23 about its outer and inner .peripheries, which flanges, are

adapted tolieover the edges of wallmembers 4 and 5. Joints 24 and 25 formed by down turned flanges 22 and 23 may be substantially the same as the other joints.

The manner in which these joints are finished may vary considerably. Thisuwill depend upon the internal pressure to be-used;- the material:of the parts and the work to be performed by the unit. After these parts are-assembled as egg,

plained, solder may be flowed into the joints to fgorm a hermetical seal. to be subjected to heavy duty work or to relaiir hi h. temperatures th se Join s mayib iased ols o i i isulostanti llv h seme ruc- We s Sho .14 with 41 rmodot h d s of c o the s c ional a t nd utters in the edges of cooperating parts to=rece ve theilaoa s, eitherii so doro or bra e re ationi o or bl thoso sierodis .flowedinio th u r which may or may not be of V formatien v fl nge a os ende ioto the gu t r no rsenibedded in the solder. A, further c makioaoaoli. o the. 'iol lir al ai l eparately and not integral with the parts of walls 2 3,

o exam le. amulet-m mbers 3!. iziaiidsa are ach i medg b mtthe l t r sins on t e. ed e f hisottom. n e' oo m mber: 5..- and h oldin mama fifihosi both edso flan ed. or" o atio iniho; utt rs. fannu ar members 3 d 32 audio utters o t e. oo rat ng ld n momhe .31.- li' l iins mem 38 r= bo c'sosilan ed or co p rationin. th s te so a-mula'rrmfimberr ammo-cooperating folding membe 3.5..

mumpmanges ay be mad not only i t ioi. ,iorm tio i; but. a so. n the. r la ion v orthe. nnul wa l m h s. w ap aren .irom aninsp otion o g l o tm. as .r nins sect n 42, 43 and 44 are each formed as a part ofthe iacci t e t n l t. i he n u ar c n enoby ously possible As'preyiously stated, Fig 1 illustrates anapplication of the; bellows unit disclosed herein.-

bel lows shown in Fig. is'employe d This bellows unit is disposed between'wheelparts 50 and |=-secured togetherby rim bolts 52; Irrespective ofthe-ex-act detailsof constructionwhich maybe changed to suit'the installation, the bellows will have a pressure transmitting fluid. conneca tic n53 comriiunicating with the interior thereof and leading'to-anysuitable control for varying the pressure.

55:. fl-uid will be forced throug-h connections 53 into thebellows to expand the same. The transmission of the pressure is thus preferably uni-,.

form axially oventheentire surface of thehottom If the finished unitis.

ssaboutih ir odeoslox 2. i: member. 3 wh c has 'boi mlmember -34 .e and t old n memb rs P1 to and b m, wa lsio and 4:1 o nioda d flansodto io tma with ad a ent sectional. sort of walLmembeijs 'while folding mem ber is 'ately formed. Further variations are quite 'When it-is desired to apply-abraking eiTect-ag-ainst the rotating parts 56% and 50, For the purposes-ofillustrationonly; the former parts like members 54 and will not permit the IEQ Of bellows unit as heretofore constructed having at least one end completely closed. It

will also be notedthat the bellows unit disclosed hel. n will; maintain a constant inside and outsideqdiameter upon. expansion and contraction .dlltifiathc mannerin which the spaced concentric" walls 2 and 3- are constructed, there being sectional. parts that are axially disposed which do not expand or contract and which do not, theiefore, flex or changetheir form, theseparts hfiin'g. for example these.designated-.4;5 and 5 in theformof Fig. 3. The folding members I ands provide the expansion and contraction, either by; flexing so thatthey lie one upon another, or by flexing. intermed ate their ends .to. provide the neocssary. cont ac i n andv xp n ontdthe-eni tire unit. Another adv ntagejn. he uows un t show s tha tr pp ng of i -therein may b eadilyprevented by an arrangement shown in Figs 1 where a connection 55 is employed with smaller D no c c on 6|. ex end ng, up ardl nto cash i t annul r k s to allow the. p

ansm ng fluid to f r e a y tr p d air on by way of said connection 60.

Fig. 'l' illustratesa substantially larger unit thanthose shown in Figs. 1 to 6, inclusive. In

1ieu-of employing the endwalls directly to trans-v mitthe pressure, end plates and 55 may. be attachedin any suitable manner. As shown,- re cesses are formed in these end plates 55 and {it and the end walls of the unit are seated therein, The manner of forming the spaced concentric walls 61 and'68 may vary considerably; butes' sentially they will comprise sectional parts having-portions 69 and'lfi 'annularly formed: and positioned axially or in the direction of move.-

mentof the bellows unit. Between these "por-f tions'sil and 'Hl'are portions H and i2 which ex.- tend inwardly and flex when the, pressure changes within the-annular chamber is. Poiv tions II and 12 may be integrally formed: with portionsss and. or they may beformed'sepas rately and secured to portions 69 andlficby any suitable type of joint. The overlapping-.1 typeiof joint. maybe changed as will be obviousfrom'thei forms shown lll' Figs. 1 to -5. Fluid may be-sup '75 or byazplper.

pliedbymeans of passages M and connection-as shownin Fig. 1.

:Inasmuchas parts H and Hand not d m: flex when the pressure changes; the

fee ted without causing excessive strain upon all) oflthepar-ts. Also; relatively high pressureemay he -produced in; chamberfli-l and readily trans mitted at end; plate.65 or. atend plate 56,. or-at both It will be apparent, however, that plate 66 may be used as a base and securedloc attached to a mounting as by means of bolts extending through openings ism by othorlsuita T able. means.

-F{Qnf1 the foregoing description; it will betchav served that I ave-di clo ed.ane i ygeandcon part terof the concentric walls: 81 Sil epill nange. Considerableexpansion can he. 6

struction of bellows capable of performing work not heretofore produced by prior art bellows. The spaced concentric walls, defining an intermediate annular chamber, do not in their entirety flex. Portions are preferably provided which flex so that these concentric walls will maintain their concentricity during expansion and contraction, and hence, will transmit pressure uniformly about an annular area.

Without further elaboration, the foregoing will so fully explain the gist of my invention that others may, by applying current knowledge, readily adapt the same for use under varying conditions of service, without eliminating certain features, which may properly be said to constitute the essential items of novelt involved, which items are intended to be defined and secured to me by the following claims.

I claim:

1. An expansible and contractible unit comprising a series of built up sectional parts defining an annular chamber, said sectional parts having portions forming axially spaced walls and angulated portions extending transversely with respect to said spaced walls and overlapping each other, said angulated portions providing for the expansion and contraction of said annular chamher.

2. An expansible and contractible unit comprising a series of built up sectional parts defining an annular chamber, said sectional parts comprising two portions, one of said portions forming spaced concentric walls extending axially with respect to said chamber and formed by axially spaced elements, the other of said portions formed by angulated elements overlapping each other and extending laterally with respect to said axially spaced elements and flexing to provide for the expansion and contraction of said annular chamber, the concentricity of the spaced walls being maintained by the flexing of said angulated elements.

3. An eXpansible and contractible unit comprising a series of built up sectional parts defining an annular chamber, said sectional parts having axially spaced portions forming walls extending substantially axiall with respect to said chamber and angulated portions extending substantially laterally with respect to said walls and in overlapping relation with respect to each other whereby to provide for the expansion and contraction of said annular chamber.

4. An expansible and contractible unit comprising a series of built-up ring-like sectional parts defining an annular chamber, said sectional parts comprising axial wall portions and transverse portions secured to the edges of the wall portions and extending crosswise of the chamber in nested relation with each other, the adjacent inner edges of transverse sections being secured together, the said axial portions forming the inner and outer walls of the unit and said transverse portions flexing to permit the axial movement of the wall portions in the expansion and contraction of the unit.

5. An expansible and contractible unit comprising spaced annular walls defining an annular chamber, said walls being formed of sectional parts, each of said walls being defined by axial and transverse portions with the transverse portions joined at their peripheries to the axial and transverse portions of adjacent sectional parts, said transverse portions being flexible to permit axial expansion of said annular chamber.

6. An expansible and contractible unit comprising spaced annular walls defining an annular chamber, said walls consisting of a number of sectional parts constructed to form inwardly extending flexible elements whereby to permit expansion and contraction of said walls, the inwardl extending flexible elements of one wall overlapping the inwardly extending flexible elements of the other wall.

WALTER C. HASSELHORN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,195,133 Dalen Aug. 15, 1916 1,726,584 Persons Sept. 3, 1929 1,909,744 Berg l May 16, 1933 2,071,583 Shutt Feb. 23, 1937 2,117,219 Shaw May 10, 1938 2,174,635 Linderman Oct. 3, 1939 2,233,132 Hewell Feb. 25, 1941 2,323,985 Fausek July 13, 1943 

